diff --git a/wp-admin/includes/post.php b/wp-admin/includes/post.php
index 8055a7b7dc..9dbc48f440 100644
--- a/wp-admin/includes/post.php
+++ b/wp-admin/includes/post.php
@@ -1722,12 +1722,12 @@ function wp_create_post_autosave( $post_data ) {
 }
 
 /**
- * Save draft or manually autosave for showing preview.
+ * Saves a draft or manually autosaves for the purpose of showing a post preview.
  *
  * @package WordPress
  * @since 2.7.0
  *
- * @return str URL to redirect to show the preview
+ * @return string URL to redirect to show the preview.
  */
 function post_preview() {
 
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 07281d29ec..0091a0fe64 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.9-alpha-40984';
+$wp_version = '4.9-alpha-40985';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.